Ferguson was a British four-wheel-drive research operation developed by Harry Ferguson from a factory in Baginton, on the outskirts of Coventry, during the 1950s. The system Ferguson created became known as the Ferguson Formula and was later used on police cars, racing cars and the Jensen Interceptor FF sports car. One of the prototype vehicles built to test the four-wheel-drive system was the R4, powered by a 2.2 litre horizontally…